Electronics and Communication Engineering - Microwave Communication - Discussion

Discussion Forum : Microwave Communication - Section 2 (Q.No. 12)
12.
If f is the frequency of electromagnetic wave, fc is cutoff frequency, then in a rectangular waveguide
attenuation is low when f > fc
attenuation is low when f < fc
attenuation is high when f < fc
either (b) or (c)
Answer: Option
Explanation:

Wavelength should be less than cutoff wavelengths.

Therefore frequency should be higher than cutoff frequency for minimum attenuation.

Discussion:
1 comments Page 1 of 1.

Lahu Hulmukhe said:   3 years ago
I think the Answe should be A and C as the waveguide has high attenuation below cutoff and low attenuation above the cutoff frequency.

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